New 90mm throttle body?

[slicks2003]

I'm looking to maximize the intake and heard a 90mm TB would be a good upgrade. Would this be a direct replacement and is it a good choice?

GM LS7 Electronic throttle body chevy LS2 LS3 NEW OEM! - eBay (item 220696112321 end time Dec-12-10 19:50:00 PST)

[Flassh]

Best bet is to check with Joe (2005SSR6speed) at Left Coast Customs. He can either confirm this one will work, or steer you to one that will.

[slicks2003]

Originally Posted by Flassh

Best bet is to check with Joe (2005SSR6speed) at Left Coast Customs. He can either confirm this one will work, or steer you to one that will.

Will do, thanks

[AMARILLO SSR]

Please post what you find out. I am thinking about one for my 06.

[RUN ROD RUN]

I could be wrong but it looks like this TB which is offer by CBM Motorsports is co-owned by our fanatic member Theturboman.

[hdflstf]

It works best on the supercharger. There's a couple of funny things that happen on the NA LS2. Something to do with a reversion effect with the stock manifold, just can't remember off the top of my head though. Still works though.

[MnMsToy]

Originally Posted by hdflstf

It works best on the supercharger. There's a couple of funny things that happen on the NA LS2. Something to do with a reversion effect with the stock manifold, just can't remember off the top of my head though. Still works though.

what if the truck is an 03

[Topspin]

It is not a bolt on to the 03/04. 90 mm is a 4 bolt design and there are tuning issues along with throttle opening problems.

[2005SSR6Speed]

The bolt pattern is different as the 03-04 is a 3 bolt design where as the 05-06 is a 4 bolt design.

They make a conversion box that will change the signal needed for the 03-04 to run the LS2 Car Style and Truck Style 90mm Throttle Bodies.

*Unless you have a Power Adder like forced induction (supercharger) or nitrous they wont be much better if at all for performance.

**There is also the newer LS3 and LS7 throttle bodies that have different scaling. These are not recommended as they will cause idle and drivability issues.

[slicks2003]

I was not aware of the bolt pattern deference.. Is there a bolt on TB that the 5.3 would benefit from?

Originally Posted by 2005SSR6Speed

The bolt pattern is different as the 03-04 is a 3 bolt design where as the 05-06 is a 4 bolt design.

They make a conversion box that will change the signal needed for the 03-04 to run the LS2 Car Style and Truck Style 90mm Throttle Bodies.

*Unless you have a Power Adder like forced induction (supercharger) or nitrous they wont be much better if at all for performance.

**There is also the newer LS3 and LS7 throttle bodies that have different scaling. These are not recommended as they will cause idle and drivability issues.

[AusTexKid]

I think what the other posters are trying to tell you is this:

Putting a larger throttle body on a stock 5.3 is not only a waste of money but will reduce the performance as well. There ARE ways ways to increase the performance of the 5.3, this is just not one of them. Here are a few suggestions

1) Higher stall torque converter
2) Performance camshaft
3) Better flowing heads
4) Performance computer tune

Any of these will give you a performance increase but the torque converter is the best bang for the buck you're gonna get. And no, that microtuner you're using does not qualify as a real performance tune. So spend your money wisely where it will actually do you some good.

[xoxoxoBruce]

Or just go straight to a 502 and be done with it.